CPC Main Group
G01N 22/00 Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more (G01N3/00 - G01N17/00, G01N24/00 take precedence)
3 direct subcodes
Child Classifications
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- G01N 22/02 Investigating the presence of flaws
- G01N 22/04 Investigating moisture content